Makes it unlawful to hunt upon another's land in Rockingham County while under the influence of alcohol or any impairing substance, as specified. Makes a violation a Class 2 misdemeanor, punishable by a fine of not more than $500 and imprisonment from 30 days to six months. Requires the offender to complete a hunter safety course, as indicated. Authorizes enforcement by law enforcement officers of the Wildlife Resources Commission, by sheriffs and deputy sheriffs, and by other law enforcement officers with general subject matter jurisdiction. Applies to offenses committed on or after October 1, 2011.